The first film in the series depicted Otis as an albino before reneging in the second one.
Rob Zombie has become a cult hero in the horror cinema lore thanks to the Firefly Trilogy. With three truly scary titles—House of 1000 Corpses, The Devil's Rejects, and 3 From Hell, the trilogy took a long time to be completed and when it did, crossed various stylistic and genre lines to turn into a unique proposition. However, a Screenrant report suggests that in doing so, Zombie has let several plot holes to drop through the cracks.
Let's recount what those are. The trilogy follows the exploits of the deranged Firefly family who pillage the world as they kill, mutilate and make their way through the deserts of Texas and Mexico while surviving bloody shootouts with the police. The films mainly involve three characters Otis B. Driftwood, Vera-Ellen "Baby" Firefly, and Captain Spaulding or "Cutter". Even though the series is focused on these three characters via a continuous storyline, there's a major plothole that seems to have gone unnoticed. For instance, in House of 1000 Corpses, Otis has albinism, a genetic condition without a cure. However, in the subsequent films, his condition is cured, and you know how many times it's brought up? Zilch!
The next one is the change in tone. Take, again, the case of the first film - it follows a group of teenagers who go into Captain Spaulding's Museum of Monsters and Madmen for a book they're working on about the country's most offbeat attractions. The film is classified as a black comedy with a cartoonish style of storytelling that elicits a humorous effect than horror. Zombie himself hasn't particularly liked the outlook and so the second film, The Devil's Rejects, turned out with far less comedic moments and became a darker, and more realistic flick as they escape a shootout with state troopers after a raid on their family home.
The biggest change between the two movies is how Otis changes into a bearded Caucasian man, with Bill Moseley's normal complexion and his eye color retained. The reason for this unusual change was never mentioned at any point during the trilogy. The only reasoning was explained behind the scenes which revealed that Zombie was looking forward to making a grittier flick, and he felt his lead character's genetic condition wouldn't fit into the narrative. Screenrant adds: "...this change creates a plot hole in the film continuity. With Otis suddenly not being albino, there’s a major character modification that makes sense only outside of the film’s world. Despite being a minor change on the surface, it would have been simple enough to leave Otis' albinism unaffected in the following two movies. Since there was no specific reason to retcon him being albino, a brief mention of the noticeable physical differences by Otis or another character would have sufficed."
The only gripe people have is that the shift could have been explained through a few lines by a supporting character to add depth to the film's universe, instead of looking like a lazy cop-out. Setting aside all the changes from House of 1000 Corpses to The Devil's Rejects, the second installment turned out to have a far greater impact and even came to be touted as Zombie's best work.